Warning!!!
As many of you will have noticed in this thread the replacement diff can't be refitted without new bolts (per fitting guidelines). Seems BMW does not automatically ship the bolts with the diff (!!!!!!!!!) even though the diff cannot be properly fitted without them so please make sure your dealer knows this. Mine (as others) has ordered and received the diff but has had to then order the bolts. BMW really needs to create a diff replacement order number on their system that bundles the diff with the bolts!
Upside, my F80 is booked in this Thursday (GB dealership) to have the work done.
Fingers crossed for no further surprises.
Wishing all on this thread the best of luck with getting their car repaired ASAP!!